Some of the changes target precincts that were split by city annexation several years ago, Elections Administrator Jacque Callanen said.

“We had a bunch of precincts that had been split when the city had robust annexation ... but once every 10 years, you have that whole cleansing, cleanup period. And that's what we just accomplished,” Callanen said.

Population growth was greater in some areas than others, so some districts gained voters in redistricting. Details on which districts gained the most voters weren't immediately available.

“It has to be as close to even as you can possibly have it,” Callanen said. “The growth in Districts 8, 9 and 10 was astronomical, so they've been way out of synch with everybody else. The redistricting allows them to cut that pie in 10 pretty equal seats,” Callanen said.

Affected voters should get new registration certificates in the mail by March 1, she said.

Polling sites will not be changed, she added.

“We're just dividing up the pie in a different way. They still live in the same place, which is near that same school,” she explained.

With the new lines approved by the city and county, the elections department will now begin relocating the 16,000 voters in the database.

“We have to pick up all the voters and move them,” she said, and that will take several weeks.

Cost of the changes mainly is for postage that amounts to 50 cents per voter notification. Some postal rates just went up Monday, Callanen noted.

No county elections are on the May ballot, and Callanen expects inquiries from people living in unincorporated areas who want to vote in San Antonio's election.

“They see all the (city election) brouhaha and call and say, 'Well, my poll's not open,'” she said.

Council candidates began filing for office on Wednesday. Early voting starts April 29.